Accuracy of ALLPATHS-LG on small genomes further improved

As of revision 38293, we’ve made a series of accuracy improvements to ALLPATHS-LG. Some of these improvements are specific to hybrid (Illumina + PacBio) datasets. Others are not, but are currently invoked only if the assembly size is under 10 Mb. Our plan is to improve the computational performance of these changes, then extend them to larger genomes.